66837402 has 96 divisors (see below), whose sum is σ = 165110400. Its totient is φ = 19426176.

The previous prime is 66837371. The next prime is 66837403. The reversal of 66837402 is 20473866.

It is a super-2 number, since 2×66837402² = 8934476612219208, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (66837403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 227968 + ... + 228260.

It is an arithmetic number, because the mean of its divisors is an integer number (1719900).

Almost surely, 2^66837402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 66837402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82555200).

66837402 is an abundant number, since it is smaller than the sum of its proper divisors (98272998).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66837402 is a wasteful number, since it uses less digits than its factorization.

66837402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372 (or 369 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 66837402 is about 8175.4144849053. The cubic root of 66837402 is about 405.8259868871.

The spelling of 66837402 in words is "sixty-six million, eight hundred thirty-seven thousand, four hundred two".